EP 0728826 B1 20010808 - Compositions comprising an acrylamide-containing polymer and use
Title (en)
Compositions comprising an acrylamide-containing polymer and use
Title (de)
Zusammensetzungen enthaltend ein Acrylamid enthaltendes Polymer und Verwendung
Title (fr)
Compositions contenant un polymère à unités acrylamide et utilisation
Publication
Application
Priority
US 39245795 A 19950221
Abstract (en)
[origin: US5693698A] A composition is provided which comprises an acrylamide-containing polymer comprising repeat units derived from at least two monomers, a polypropylene glycol, and optionally, a polysaccharide. Also provided is a water-based composition which can be used as drilling fluid wherein the composition comprises calcium chloride, an acrylamide-containing polymer which has repeat units derived from at least two monomers, a polypropylene glycol, and optionally, a polysaccharide. Additionally, a process for using a water-based fluid which has the characteristics of an oil-based fluid as to use in drilling a gumbo shale or highly hydratable formation is provided wherein the process comprises contacting the shale or formation with a composition comprising calcium chloride, an acrylamide-containing polymer, a polypropylene glycol, and optionally, a polysaccharide wherein the acrylamide-containing polymer, polypropylene glycol, and polysaccharide are each present in a sufficient amount to effect the control of fluid loss of a water-based composition.
IPC 1-7
IPC 8 full level
C09K 8/12 (2006.01); C09K 8/24 (2006.01); C09K 8/60 (2006.01)
CPC (source: EP US)
C09K 8/12 (2013.01 - EP US); C09K 8/24 (2013.01 - EP US); C09K 8/60 (2013.01 - EP US)
Designated contracting state (EPC)
DE DK FR GB IE IT NL
DOCDB simple family (publication)
US 5693698 A 19971202; AR 000977 A1 19970827; BR 9600777 A 19971223; CA 2161916 A1 19960822; CA 2161916 C 20011218; CN 1065889 C 20010516; CN 1136576 A 19961127; DE 69614287 D1 20010913; DE 69614287 T2 20020502; DK 0728826 T3 20011008; EP 0728826 A1 19960828; EP 0728826 B1 20010808; NO 311980 B1 20020225; NO 960673 D0 19960220; NO 960673 L 19960822; US 5684075 A 19971104
DOCDB simple family (application)
US 45341895 A 19950530; AR 10142096 A 19960216; BR 9600777 A 19960216; CA 2161916 A 19951101; CN 96101354 A 19960201; DE 69614287 T 19960220; DK 96102540 T 19960220; EP 96102540 A 19960220; NO 960673 A 19960220; US 39245795 A 19950221